PINPOINT TEST G258127P4

Pinpoint Tests

PINPOINT TEST G258127p4 : DTC P0121, P0122, P0123; THROTTLE POSITION (TP) SENSOR RANGE/PERFORMANCE, HIGH/LOW VOLTAGE

G258127t11 : CHECK THE TP SENSOR SENSING CIRCUIT TP1 FOR HIGH RESISTANCE
1. Disconnect the battery negative terminal.
2. Disconnect the ECM electrical connector, PI01.
3. Disconnect the TP sensor electrical connector, PI26.
4. Measure the resistance between PI01, pin 75 (R) and PI26, pin 03 (R).

- Is the resistance greater than 5 Ohms?

->YES
REPAIR the high resistance circuit. CLEAR the DTC. TEST the system for normal operation.

->NO
GO to Pinpoint Test G258127t12.

G258127t12 : CHECK THE TP SENSOR SENSING CIRCUIT TP1 FOR SHORT TO HIGH VOLTAGE
1. Reconnect the battery negative terminal.
2. Turn the ignition switch to the ON position.
3. Measure the voltage between PI26, pin 03 (R) and GROUND.

- Is the voltage greater than 5 volts?

->YES
REPAIR the short circuit to high voltage. CLEAR the DTC. TEST the system for normal operation.

->NO
GO to Pinpoint Test G258127t13.

G258127t13 : CHECK THE TP SENSOR SENSING CIRCUIT TP1 FOR SHORT TO GROUND
1. Turn the ignition switch to the OFF position.
2. Measure the resistance between PI26, pin 03 (R) and GROUND.

- Is the resistance less than 10,000 Ohms?

->YES
REPAIR the short circuit to GROUND. CLEAR the DTC. TEST the system for normal operation.

->NO
INSTALL a new TP sensor. CLEAR the DTC. TEST the system for normal operation.